How to translate “给力” in English?Welcome to Chinese SE @user4018. The idea is to keep all the information publicly available here. If the person who posted the question have further questions related to your answer he/she can post comments here. You can then edit your answer to make it more clear. No need to be apologetic for bad English. Others can suggest improvements to your answer. For example improve the language.

Is 了 optional when a time word is present?@JonHargett it was not an answer to the question, I was trying to explain that in your example sentence 了 don't contribute to the sentence, thus you're asking whether it's necessary to include.